<ion-tabs [ngClass]="{'theme_pink':_theme == 'theme_pink','theme_dark':_theme == 'theme_dark','theme_red':_theme == 'theme_red','theme_yellow':_theme == 'theme_yellow','theme_green':_theme == 'theme_green','theme_blue':_theme == 'theme_blue','theme_purple':_theme == 'theme_purple'}">
    <ion-tab [root]="tab1Root" tabIcon="home"></ion-tab>
    <ion-tab [root]="tab2Root" tabIcon="apps"></ion-tab>
    <ion-tab [root]="tab3Root" tabIcon="aperture"></ion-tab>
    <ion-tab [root]="tab4Root" tabIcon="chatboxes"></ion-tab>
</ion-tabs>